[Antennas] How can I tell if my signal is getting out?
David Kelley
[email protected]
2002年4月11日 13:29:24 -0400
>>Message: 2
>Date: 2002年4月11日 07:19:22 -0700 (PDT)
>From: Pat W <[email protected]>
>Subject: Re: [Antennas] How can I tell if my signal is getting out?
>To: [email protected]
>> There is the principle of reciprocity which states
>that the signal strength of the station you hear will
>be the signal strength that the other station hears you
>if both stations run the same power. Of course there
>are exceptions to this rule, eg, QSB, etc. But, this
>principle generally holds true.
> So, if you hear a strong station on your receiver,
>that station should hear you with the same signal
>strength.
While this is true in principle, it does not take into
account other variables such as the signal-to-noise
ratio and signal-to-interference ratio. A Q5 copy
signal in a quiet location could be barely discernable
in a noisy location. The ability to receive a signal
depends not only upon the strength of that signal at
the receiver's location, but also upon the RF environ-
ment in which that receiver is operating.
73,
Dave
--
Dave Kelley, NB4J
State College, PA
Centre County